import { useIsMounted } from "~/hooks/useIsMounted";
 
function Component() {
  const isMounted = useIsMounted();
 
  useEffect(() => {
    if (isMounted()) {
      // Do something when the component is mounted
    }
  }, [isMounted]);
 
  return <div>Component</div>;
}

function useIsMounted(): () => boolean;